Font size

We should set the first paragraph font-size to 10px.While my code are as follows.System said it is wrong. Have somebody tell me how to change it ?
p style=“font-size: 10px”

What is the error message you receive? Can we see your code? Make sure your browser doesn’t have a minimum font-size setting of 12px (do a google search)

The wrong reason is my browser minimum font-size are setted in a wrong number. The question have been solved. Thank you for your help!